When you buy a Bundle, your getting a discount because only 1 person can use 1 PC at a time. The $4000 lathe package is a $1000 add on when you Bundle it with Mill. Same with wire. As a second seat it would be $3250.
So if you want to UnBundle your lathe and wire it would be $3250 (lathe second seat) less the $1000 you already paid to add lathe in the bundle. So, $2250. Same for Wire ($2250). Plus maintenance.
Sounds like they gave you a discount.
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